1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3acc75a9276f275afc78c6ff01e0a422670f8e788db6f9d06fd23e80f851489. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c2abc3b-3d47-42e0-b325-56e3c4a1c6b1.json and https://artists.proofprofile.net/proofs/artist/6c2abc3b-3d47-42e0-b325-56e3c4a1c6b1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbbad56ed40e3867409b5976db5f359805929137ec863f3c2feb93cb027bb44. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:50:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971403135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cfede86c6e7233c3dd686aa9c0152b9abdbe605c36c0f749fc87cc21e9c689. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971403140.
Potpurrí Homenaje a Ruben Dario: El Rosario de Filigrana / Xocbishuy / Huipiles y Rebozos / Flor de Agua / Rebozo Yucateco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bbc1b146d5b525f2dc9ff4cd4351826cc78c14293ee2a4c4de5ae19db56795. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971403142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fd933440b189eb8d66bcf1e573aaafe78bcf9c58d90584339ef0481a27d385. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971511221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5588f6270e0d03fde00043236e69dee86b1bdcb52f128991f36aec5bfe2f33. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971511222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bbb9de5656b9dd7ce14554d792b3d0f7a1f68020e070d5d52baba717a3ed00. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971511224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dc8386231da4eac5614392c8e2dd372e2364db57293dedf3ec6b1f8cf89a1b. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971511226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3ee394c7c19055236a37646b5c39871a462fbc7b2c29bb8b352d726593170e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971511228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe152fa7d771c8ceaef32360705ca59c3a64a5add993410860b705ae026ad99fe. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971511229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9582323991965ff2c982c6bb1e1d6f1516c89d47753f9affc20b0cd295093c1. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971511230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9957f1635adf7e99ede42eed5f5fb34a292126413e616b7eacd91d9669e8f29. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:05:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2451437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c191d21e8d69cd9bd8920b22ce67fffdd74e498e1d0351f5253942ac1721702. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2451443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1576aa6c829c87440bf7c91b739cb4b18bb38bd5ac6c7cb0350f163ad269fac8. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2451446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6654bb34e419b0c5cd4bd68af8536b6bd7fb369d53634d73fad945cde6cd989a. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2451447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a2d17dbeacb999e6d55bec40d15ddd5ade5c346d00a52770e8815782624d65. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2451448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424a039a5bde9cf7ebd6ea86c281f547b15ec5f81ee782b9746dfc692a5ad30f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2451449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d995916cd7332629042c9d2e4e70711e23cc66654aa00a523c0d9e61dc3bc79. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBF2490267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f0535603163c1e3889940364e7a1777feef605f234ee995cd5e048975e0eb4. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFL2597573.